class Sum{
	int n;
	float f() {
		float sum = 0;
		for(int i=1;i<=n;i++)
			sum = sum+i;
		return sum;
	}
}
class Average extends Sum {
	int n;
	float f() {
		float c;
		super.n=n;
		c = super.f();
		return c/n;
	}
	float g() {
		float c;
		c= super.f();
		return c/2;
	}
}
public class EX5_7 {
	public static void main(String args[]) {
		Average aver = new Average();
		aver.n = 100;
		float resultOne = aver.f();
		float resultTwo = aver.g();
		System.out.println("resultOne="+resultOne);
		System.out.println("resultTwo="+resultTwo);
	}
}
